Weft-detector for looms



E. H. RYON.

wan DETECTOR FoR Looms.

APPLICATION FILED MN. 2, 19 18.

Patented Apr. 20, 1920.-

2 sums-sun I.

E. H. RYON.

WEFT DETECTOR FOILLQOMS'. APPLICATION FILED IAN-2.1918.

1,337,73 Patented Apr. 20,1920.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

EPPA H. RYON, OF WALTHAM, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLESLOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHU-SETTS.

WEFT-DETECTOR FOR LOOMS.

Specification of Letters Patent.

, Patented Apr. 20, 1920.

Application filed January 2, 1918. Serial No. 209,818. 1

To all whom it may concern:

Be it known that I, EPPA. H. RYoN, a citizen. of the United States,residing at Waltham, in the county of-Middlesex and State ofMassachusetts,- haveinvented a new and useful Weft-Detector for Looms,of which the following isfia specification.

This invention relates particularly to that type of weft detectingmechanism by means of which substantial exhaustion of weft on the activeweft carrier is ascertained. More specifically my invention relates to aclass of such detectors in which a detecting member is pivotallysupported and is so formed that it will swing upon its pivot only upon'engagement with a substantially exhausted weft carrier. It is thegeneral object of my invention to improve and simplify the constructionof such devices,.to the end that their operation may be made reliableand satisfactory.

With this general object in View, my invention relates to certaincombinations of parts which will be hereinafter described and moreparticularly pointed out in the appended claims.

A preferred form of my invention shown in the drawings, in which Figure1 is a plan View of my improved detecting mechanism;

Fig. 2 is a side elevation thereof;

ig. 3 is a vertical sectional view taken along the line 33 in Fig. 1;

Fig. 4.- is a partial horizontal plan view taken along the line 4 4 inFig. .2'

Figs. '5 and 6 are views 7 but showing the parts in different positions,and

Fig. 7. is a detail sectional View of a slight modification.

I have shown my invention embodied in a weft detecting mechanism of thegeneral type shown in my Patent No. 972,722 granted to me October 11,1910'.

This mechanism includes a stand or frame 10 havingassociated therewithan actuator 11 mounted upon a floating pivot 12 and having one endmovable in a slot 13 (Fig. 3) formed in a bracket 14 fixed to the frame10. A plunger 15 is slidable transversely of the slot .13 through a hole16 in the bracket, said plunger being pivoted at 17 to an arm 18 mountedon a short rock shaft 19. The shaft 19 is carried in bearings secured tothe frame 10, and at its opposite similar tb Fig. 4,

end is provided with a second arm 20, positioned for engagement by aslide 21 mounted for longitudinal movement in a stand 22.- A spring'23is interposed betweena collar 24 and one of the bearings of the shaft 19and causes the arm 20 to yieldingly engage the left hand or front end ofthe s 21.

I The stand 22 is secured to the fra e 1.0 by a bolt 25 and may bevertically a justed thereon by an adjusting screw 26. The slide 21 isformed as a hollow shell, one end of which directly engages the arm 20.Near the rear or right hand end of the slide 21 is pivotally connected adetectin member 27, preferably of hard rubber or l ber and provided withshallow teeth on its outer face.

.A plunger 28 surrounded by a light coiled spring 29 is slidable in abearing 30 in the slide 21, and engages the detector-27 as shown in Fig.4, in which the detector 27 is in its normal position. I I

In F ig. 7 I haveshown a slight modification in which the plunger 28 iss'lidable in a sleeve 31. -The sleeve is threaded into the frame of'theslide 21 and is slotted at one end so that it. may be adjusted to varythe tension of the spring 29.

The method of operation of my improved detector is extremely simple. Thenormal position of the slide 21 and detector 27 is shown in Fig. 5. Thiscorresponds to the position of the plunger 15 shown in Figs. 1 and 2.Whenever the detector 27 is engaged by a weft carrier having a supply ofweft thereon, the teeth on the end of the detector prevent the detectorfrom sliding along the weft carrier, and the slide 21 is thereforepushed forward to the position shown in Fig. 4, in which position theplunger 15 is withdrawn from the path of the actuator.

When, however, the supply of weft on the weft carrier issubstantially-exhausted, the weft will no longer prevent, the sliding ofthe detector along the weft carrier, and the parts will assume theposition shown in Fig. 6, the detector swinging about its pivot and theslide 21 remaining unmoved. The plunger 15 is thus left in the path ofthe actuator 11 which is thereby rendered operative to indicate atransfer.

It will be seen that this construction provides an extremely simpledetector, as the slide'21 has only a single movable element mountedthereon, and furthermore, the slide itself directly engages the arm 20,so that there are no connections between the parts subject to wear andconsequent inaccuracy in operation. The detector 27 is also free toswing farther to the left as viewed in Fig. 6, so that the slide 21 willdirectly engage a misplaced shuttle. This arrangement preventsamisplaced shuttle from placing ex-- cessive strain upon the detectorspring 29.

It will be evident that changes and modifications may be made in minvention by those skilled in the art, wit out departing from thespirit. and scope thereof as set forth in the claims, and I do not wishto be otherwise limited to the details herein disclosed, but What Iclaim is 1. A weft detecting mechanism comprising a stand, a slidemovably mounted thereon, an actuator, a member controlling said actuatorand normally positioned to render said actuator operative, connectionsbetween said member and said slide, a single detector movably mounteddirect onsaid slide, and a spring yieldingly holding said detector inposition toengage ,a weft carrier, said de tector and slide beingmovable in a straight line as a unit and in fixed relative position byengagement of said detector by a suflicient supply of weft on an activeweft carrier,- and said detector being movable relativelyito said slideby engagement of said detector by a substantially exhausted weftcarrier.

2. A weft detecting mechanism having, in combination, an actuator,controlling devices including an arm, a slide directly engaging andmoving said arm, a single detector directly pivoted to said slide, aplunger engagin said detector, a spring for said plunger, an means toadjust the tension of said spring, comprising a sleeve threaded in saidslide and forming both a bearing for said plunger and an adjustablesupport for said spring.

3. A weft detecting mechanism comprising a stand, a slide mountedthereon, said slide being positioned to directly engage a misplacedshuttle, a single detector pivoted between the upper and lower plates ofsaid slide, an actuator, and connections through which said slide iseffective to render said actuator inoperative when said slide is movedforward from normal position.

In testimony whereof I have hereunto affixed my signature.

EPPA H. RYON.

